Study On High Temperature And Pressure ESP Performance Testing System Design

With the development of oil industry and deeply oilfield exploration in our country, electric submersible pump (ESP) has been one of the most important mechanical oil extraction equipment. Applying mechanical oil extraction method to enhance the oil recovery ratio is an significant process in the whole oilfield exploration. As an important mechanical oil extraction equipment, ESP has many advantages which others lack. It takes a more and more important part of oilfield. Using ESP for high duty oil extraction is an important means in oilfield stable yields. While oil field exploitation improving, oil recovery technique has also developed unceasingly.Domestic ESP technique has also get some progress these years. ESP has been used more and more widely, and its performance has been enhanced very fast. It requires the performance testing techniques develop fast at the same time. The most outstanding question is the testing of high temperature and pressure ESP. It still is underway in our country. A high temperature and pressure well was drilled in Daqing Oilfield Limited Company Reservoir Engineering Research Institute National ESP Testing Centre in 1992. It keep the water liquid state on 150 centigrade by high pressure. This system can simulate operational mode 3000 meters under the ground. But many new ESPs have been produced these years. The quondam testing system couldn't meet the testing need. A new testing system is desiderated eagerly.This paper developed a high temperature and pressure ESP testing experimentation system. Hydraulic/thermodynamic analysis calculation has been carried on. Friction resistance from constant pressure point to the suction inlet of heat pomp and the ESP in heating-forced cycle and experimentation primary cycle respectively. Keeping the water liquid state on 180 centigrade, constant pressure value was fixed on 2.5 MPa. Through the calculation about thermal load including the heat that the water in the system and the equipment need and the heat Loss. Thermal load of the heater is 350kW and calorifier has been selected. In order to protect ESP from emanating too much heat to keep the temperature and pressure of the system steady, heat exchange system has been designed. Cold load and heat exchange square have been calculated. Friction resistance and the size of the cold water cistern have been calculated. These provide necessary academic foundation for the testing experimentation of high temperature and pressure ESP.